SIST EN 1648-1:2005

SLOVENSKI STANDARD
SIST EN 1648-1:2005
01-april-2005
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Leisure accommodation vehicles - 12 V direct current extra low voltage electrical
installations - Part 1: Caravans
Bewohnbare Freizeitfahrzeuge - Elektrische Anlagen für DC 12 V - Teil 1: Caravans
Véhicules habitables de loisirs - Installations électriques a tres basse tension de 12 V en
courant continu - Partie 1: Caravanes
Ta slovenski standard je istoveten z: EN 1648-1:2004
ICS:
43.040.10 (OHNWULþQDLQHOHNWURQVND Electrical and electronic
RSUHPD equipment
43.100 Osebni avtomobili. Bivalne Passenger cars. Caravans
prikolice in lahke prikolice and light trailers
SIST EN 1648-1:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 1648-1:2005

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SIST EN 1648-1:2005



EUROPEAN STANDARD
EN 1648-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2004
ICS 43.100; 43.040.10 Supersedes EN 1648-1:1997
English version
Leisure accommodation vehicles - 12 V direct current extra low
voltage electrical installations - Part 1: Caravans
Véhicules habitables de loisirs - Installations électriques à Bewohnbare Freizeitfahrzeuge - Elektrische Anlagen für
très basse tension de 12 V en courant continu - Partie 1: DC 12 V - Teil 1: Caravans
Caravanes
This European Standard was approved by CEN on 14 October 2004.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.




EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1648-1:2004: E
worldwide for CEN national Members.

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SIST EN 1648-1:2005
EN 1648-1:2004 (E)
Contents
Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .5
4 Power supply.5
4.1 General.5
4.2 Sources of supply.5
4.3 Auxiliary batteries.6
4.4 Other sources of supply .7
4.5 Protective measures.7
5 Wiring.7
5.1 Connection to electrical system of towing vehicle .7
5.2 Cable and fixed wiring cross-sectional areas.8
5.3 Fixed wiring.9
6 Overcurrent protection.10
6.1 Protection of positive conductors .10
6.2 Types of device.10
6.3 Installation of fuses .10
6.4 Prohibited locations .10
7 Installation of appliances.10
7.1 General.10
7.2 Selection and connection of appliances .10
7.3 Socket outlets .10
7.4 Battery charger .11
7.5 External lights .11
7.6 Voltage drop.11
8 User's Handbook .12
Annex A (informative) Relation of cable cross-sectional area, current flow and cable length for fixed
wiring installations .13
Bibliography .15


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SIST EN 1648-1:2005
EN 1648-1:2004 (E)
Foreword
This document (EN 1648-1:2004) has been prepared by Technical Committee CEN/TC 245 “Leisure
accommodation vehicles”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by June 2005, and conflicting national standards shall be withdrawn at the latest by
June 2005.
This European Standard supersedes EN 1648-1:1997.
This European Standard is based on ISO 8818 “Leisure accommodation vehicles — Caravans — 12 V direct
current extra low voltage electrical installations” and takes into consideration specific aspects relating to electrical
installations in caravans.
The requirements of relative ISO/IEC and CENELEC publications were taken into consideration during the prepara-
tion of this European Standard.
This European Standard is one of a series covering the habitation aspects of leisure accommodation vehicles.
Requirements for 12 V direct current extra low voltage electrical installations for motor caravans are specified in
EN 1648-2.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-
tries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Esto-
nia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.


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SIST EN 1648-1:2005
EN 1648-1:2004 (E)
1 Scope
This document specifies safety, health and functional requirements for 12 V direct current (DC) extra low voltage
(ELV) electrical installations for habitation aspects of caravans. It covers the design and integration of the caravan
system with the towing vehicle system.
It does not apply to commercial trailers, nor does it include requirements for ELV road lighting and signalling lamps
and their installations, except for safety requirements for the routing of cables in LPG storage compartments.
This document also specifies the ELV output requirements of low voltage (LV) equipment that may be used to
provide an ELV supply but it does not specify safety, technical and functional requirements for LV appliances and
installations. Requirements for LV installations are specified in HD 384-7-708.S1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
EN 1645-1, Leisure accommodation vehicles — Caravans — Part 1: Habitation requirements relating to health and
safety.
EN 13878:2003, Leisure accommodation vehicles — Terms and definitions.
EN 50102, Degrees of protection provided by enclosures for electrical equipment against external mechanical
impacts (IK code).
EN 60335-1, Household and similar electrical appliances - Safety - Part 1: General requirements (IEC 60335-
1:2001, modified).
EN 60335-2-29, Safety of household and similar electrical appliances — Part 2: Particular requirements for battery
chargers (IEC 60335-2-29:1994, modified).
EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989).
EN 61558-1, Safety of power transformers, power supply units and similar — Part 1: General requirements and
tests (IEC 61558-1:1997, modified).
EN 61558-2-1, Safety of power transformers, power supply units and similar — Part 2-1: Particular requirements for
separating transformers for general use (IEC 61558-2-1:1997).
EN 61558-2-4, Safety of power transformers, power supply units and similar — Part 2-4: Particular requirements for
isolating transformers for general use (IEC 61558-2-4:1997).
EN 61558-2-6, Safety of power transformers, power supply units and similar — Part 2-6: Particular requirements for
safety isolating transformers for general use (IEC 61558-2-6:1997).
EN ISO 11446, Road vehicles — Connectors for the electrical connection of towing and towed vehicles — 13-pole
connectors for vehicles with 12 V nominal supply voltage (ISO 11446:2004).
HD 21.1 S4, Cables of rated voltages up to and including 450/750 V and having thermoplastic insulation —
Part 1: General requirements.
HD 21.3 S3, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V — Part 3: Non-
sheathed cables for fixed wiring (IEC 60227-3:1993, modified).
HD 21.4 S2, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V —
Part 4: Sheathed cables for fixed wiring.
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SIST EN 1648-1:2005
EN 1648-1:2004 (E)
HD 21.5 S3, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V – Part 5: Flexible
cables (cords) (IEC 60227-5:1979, modified).
HD 22.1 S4, Cables of rated voltages up to and including 450/750 V and having cross-linked insulation –
Part 1: General requirements.
HD 22.4 S3, Rubber insulated cables of rated voltages up to and including 450/750 V — Part 4: Cords and flexible
cables (IEC 60245-4:1994, modified).
ISO 1724, Road vehicles – Connectors for the electrical connection of towing and towed vehicles -- 7-pole con-
nector type 12 N (normal) for vehicles with 12 V nominal supply voltage.
ISO 3732, Road vehicles – Connectors for the electrical connection of towing and towed vehicles -- 7-pole con-
nector type 12 S (supplementary) for vehicles with 12 V nominal supply voltage.
ISO 6309, Fire protection — Safety signs.
ISO 6722, Road vehicles — 60 V and 600 V single-core cables – Dimensions, test methods and requirements.
ISO 8820-1, Road vehicles — Fuse-links — Part 1: Definitions and general test requirements.
ISO 8820-3, Road vehicles — Fuse-links — Part 3: Fuse-links with tabs (blade type).
ISO 8820-4, Road vehicles — Fuse-links — Part 4: Fuse-links with female contacts (type A) and bolt-in contacts
(type B) and their test fixtures.
3 Terms and definitions
For the purposes of this document the terms and definitions given in EN 13878:2003 apply.
4 Power supply
4.1 General
The power supply shall be a nominal DC 12 V (see also 4.4.1 and 7.1).
4.2 Sources of supply
The supply shall be obtained from one or more of the following sources:
a) the electrical installation of the towing vehicle;
b) an auxiliary battery mounted on the caravan (see 4.3);
c) LV supply via an on-board mounted transformer/rectifier unit that complies with the requirements of
EN 60335-1, EN 61558-1, EN 61558-2-1, EN 61558-2-4 and EN 61558-2-6;
d) DC generator that is driven by any form of energy (see 4.4);
e) solar energy cells (see 4.4.2).
If several sources of supply are used it shall be ensured that there is no unfavourable interaction.
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SIST EN 1648-1:2005
EN 1648-1:2004 (E)
4.3 Auxiliary batteries
4.3.1 Type of battery
An auxiliary battery shall be of the rechargeable type. Non-rechargeable batteries are not auxiliary batteries
according to 4.3. They may be used, provided that they are used in circuits separated from other sources of electri-
cal supply.
4.3.2 Capacity
An auxiliary battery shall have a minimum capacity of 36 ampere-hours (Ah) at 20 h discharge rate.
NOTE It is recommended to use a battery designed to be discharged over long periods at a relatively low current.
4.3.3 Terminals
Auxiliary battery terminals shall be clearly and durably marked “+” and “−“. Connections to auxiliary battery
terminals shall be securely clamped or bolted to ensure continuous contact and shall be insulated unless the
auxiliary battery is provided with an insulating cover.
4.3.4 Location
An auxiliary battery shall be placed in a compartment according to 4.3.5, which is designed to protect it from
mechanical damage, with easy access for maintenance or removal and secured to prevent movement of the
battery, e.g. when the caravan is in motion.
4.3.5 Auxiliary battery compartment
An acid resistant liquid tight tray shall be installed under an auxiliary battery whose electrolyte is liquid capable of
holding at least 20 % of the electrolyte capacity of the recommended battery, when in place.
The interior of an auxiliary battery compartment shall be ventilated and protected against the corrosive effect of
acid-laden gases, either by
a) installing a sealed auxiliary battery that incorporates an external ventilating kit that is taken to the exterior of
the caravan; or
b) installing an auxiliary battery in an enclosed battery compartment that is protected internally against corrosion
and is ventilated to the exterior of the caravan by means of a suitable tube with a inside diameter of minimum
5 mm and maximum 8 mm at the top of the auxiliary battery compartment in accordance with the battery
manufacturer's instructions or as supplied by the manufacturer of the auxiliary battery; or
c) ventilating the compartment at low-level and high-level to the exterior of the caravan and constructing the inte-
rior of the compartment, which shall have gas tight joints and seams, including the sides of the ventilator open-
ings, of acid-resistant material or providing it with an anti-corrosive finish. The minimum size of ventilation shall
2 2
be not less than 80 mm at low level and not less than 80 mm at high level. If the compartment opens into the
interior of the carav
...